AP Computer Science Principles Unit 1-4 Questions and Correct Answers 2026

AP Computer Science Principles Unit 1-4 Questions and Correct Answers 2026 What is the best explanation for why digital data is represented in computers in binary? A. The binary number system is the only system flexible enough to allow for representing data other than numbers. B. It's easier, cheaper, and more reliable to build machines and devices that only have to distinguish between binary states. C. It typically takes fewer digits to represent a number in binary when compared to other number systems (for example, the decimal number system) D. It's impossible to build a computing machine that uses anything but binary to represent numbers - Correct Answer B What is the 4-bit binary number for the decimal number Ten (10)? A. 0010 B. 1010 C. 0110 D. 0101 - Correct Answer B What is the minimum number of bits you would need to encode the 26 letters of the alphabet plus a space - a total of 27 characters? A. 2 bits B. 3 bits C. 5 bits D. 6 bits - Correct Answer C Number systems with different bases suc